It should be OK blocked off -- if the fuel pressure is low enough (weber says 2.5 to 3 pounds). Most troubleshooter vacuum gauges can measure fuel pump pressure, so check it! High pressure can cause intermittent issues besides leaking.

If the fuel pressure is ok, put a cap on the brass fitting along with an appropriate size hose clamp.


> Is there anyway I can send the fuel back to the tank?

If you add a return line to the fuel tank, sure.